diff --git a/setup.cfg b/setup.cfg
index ea85f5a..84117e5 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -8,6 +8,7 @@ author_email = rayluo.mba@gmail.com
 url = https://github.com/rayluo/identity
 project_urls =
     Changelog = https://github.com/rayluo/identity/releases
+    Documentation = https://identity-library.readthedocs.io/
 keywords = identity, auth, authentication, authorization
 license = MIT
 classifiers =